(C–Cl) bond in `CH_2`= CH–Cl(vinyl chloride) is stabilized in the same ways as in

C-Cl bond in CH_(2) = CH - Cl is difficult to cleave due to

Neither vinyl chloride (CH_2=CH-Cl) nor chlorobenzene (C_6H_5-Cl) can be used as alkylating agent in the Friedel-Crafts reaction -Why ?

Give reasons: C-Cl bond length in chlorobenzene is shorter than C-Cl bond length in CH_3-Cl .

Give reasons- (i) C-Cl bond length in chlorobenzene is shorter than C-Cl bond length in CH_(3)-Cl .